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Last Updated: Wednesday, March 6, 2013 7:59 AM
Areas Subject to Transportation Conformity Requirements in California
|
County/Planning Area/Air District |
Regional Planning Agency Doing Conformity Analysis |
Reason for Conformity Requirements (Federal Nonattainment Pollutant, or Attainment with "Section 175A" Maintenance SIP) |
|---|---|---|
| Tehama | No MPO — Rural Area Tehama County Transportation Commission |
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No MPO — Rural Area |
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Yuba and Northern Sutter (outside Sacramento ozone area) |
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Sacramento Metropolitan area: Sacramento; Southern Sutter; Yolo; Solano (E. part); El Dorado, Placer (except Lake Tahoe basin) |
Sacramento Area Council of Governments Metropolitan Transportation Commission |
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El Dorado, Placer; Nevada Dept. of Environmental Protection (Lake Tahoe basin) |
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Bay Area AQMD: Sonoma (S. part), Napa, Solano (W. part), Marin, Contra Costa, Alameda, San Francisco, San Mateo, Santa Clara |
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No MPO — Rural Area |
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No MPO — Rural Area Tuolumne Co. Transportation Council Mariposa County LTC (Public Works - Transportation Planning)) |
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Kern |
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| San Luis Obispo | San Luis Obispo Council of Governments |
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Los Angeles |
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Los Angeles |
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San Bernardino |
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| Morongo Band of Mission Indians |
As part of the South Coast air basin:
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San Bernardino |
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San Bernardino |
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Riverside |
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| Pechanga Band of Luiseño Indians |
As part of the South Coast air basin:
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Riverside |
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No MPO — Rural Area |
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No MPO — Rural Area |
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Conformity Areas Table with Regional Conformity Status (PDF file)
Notes:
* Areas where ONLY the 1997 ozone standard applies will no longer be subject to conformity requirements after July 20, 2013. According to the U.S. EPA Final Rule designating nonattainment areas for the 2008 standard, the 1997 standard is revoked for conformity purposes when conformity applies for the 2008 standard — 1 year after the effective date of the nonattainment designations. 2008-standard designations became effective on 7/20/2012, so the 1997 standard will be revoked for conformity purposes on 7/20/2013. The 1997 standard remains in effect in those areas, and they remain nonattainment, for other (non-conformity-related) purposes unless and until the U.S. EPA finalizes another implementation rule that more broadly revokes the older standard.
Tribal considerations: The separate tribal nonattainment areas (the Morongo Band of Mission Indians and the Pechanga Band of Luiseño Indians) are designated individually by the U.S. EPA for ozone (2008 standard) with classifications that differ from the classification of the surrounding South Coast area.
Federal Nonattainment and Maintenance Areas Only: Areas are included in this table only if they are designated by U.S. EPA as nonattainment or attainment (with a Maintenance SIP) under the Federal Clean Air Act (see 40 CFR 81.305 and the U.S. EPA "Green Book”), for pollutants that trigger Transportation Conformity requirements under Federal Clean Air Act Section 176(c) and 40 CFR 93 Subpart A. Many additional areas fail to attain one or more State air quality standards, and the Los Angeles County portion of the South Coast air basin is nonattainment for the 2008 Lead (Pb) NAAQS; however, nonattainment of the State standards and the Lead NAAQS does not trigger transportation conformity requirements under the Federal Clean Air Act.
Other Information Sources:
The latest Air Pollution Control District
and Air Quality Management District contact information
can be obtained through the California
Air Resources Board 
. Links above were current as of February 2013. Air district information can also be obtained at CAPCOA .
For the latest contact information related to State and Regional transportation planning agencies, refer to the Caltrans Transportation Planning web site. MPO/RTPA web links were current as of February 2013. MPO and RTPA information can also be obtained at CALCOG .
Maps and other materials related to nonattainment area designations in California can be found at the California Air Resources Board, and at EPA Region 9 (both ).
More information regarding Transportation Conformity, including links to legislation, regulations, and guidance, can be found at the Federal Highway Administration and EPA conformity web sites (both ).
Sources:
Federal Highway Administration , US
Environmental Protection Agency , California
Air Resources Board ,
Metropolitan Planning Organizations shown in table , Caltrans Division of Transportation Planning
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